A
01
Installed & verified
Exact chassis and phase, with an attributable install record.
- Exact chassis and phase identified
- Attributable install evidence
- Install requirements confirmed
Version 1.0 · August 2026
Fitment grades
without theater.
A letter is useful only when you can see what earned it. Our grades describe evidence strength—not product style, price or commission.
B
02
Independently documented
Consistent independent evidence beyond the seller listing.
- Independent evidence beyond seller
- No material conflicts found
- Vehicle configuration documented
C
03
Seller claimed
Compatibility is published by the seller but not independently confirmed.
- Seller compatibility statement recorded
- No independent install yet
- CTA carries an evidence warning
X
04
Conflict or unknown
Claims disagree, exclusions are unclear, or evidence is incomplete.
- Conflicting claims or install outcomes
- Phase or option exclusions unresolved
- Not recommended until clarified
The editorial firewall
What cannot
change a grade.
Commission rate
A higher payout cannot improve evidence or placement inside the grade system.
Retail price
Expensive carbon is not automatically better fitting, lighter or better documented.
Brand familiarity
Reputation adds context, but every part record still needs product-level evidence.
Visual appearance
A glossy weave cannot prove the layup, cure, core material or mounting accuracy.
Evidence ladder
From claim
to confidence.
- SourceSeller fitment statement
Captured with exact wording and check date.
- NormalizeVehicle phase & exclusions
Body, year, trim, options and required modifications.
- CorroborateIndependent install evidence
Photos, video, documents or attributable shop reports.
- PublishGrade with last-reviewed date
Conflicts stay visible rather than averaged away.
Found a mismatch?